Adjustable cam driving mechanism

ABSTRACT

The present invention discloses an adjustable cam driving mechanism which comprises a support frame, an input gear, an intermediate gear and an output gear. The input gear, the intermediate gear and the output gear are respectively arranged on the support frame. The intermediate gear is adjustably fixed on the support frame. The input gear and/or the output gear are/is adjustably fixed on the support frame. The adjustable cam driving mechanism of the present invention can adapt to engines of different displacement volumes.

TECHNICAL FIELD

The present invention relates to the technical field of engines, andmore particularly to an adjustable cam driving mechanism.

BACKGROUND

At present, the cam driving mechanism of an engine is usually matchedwith an engine of only one displacement volume. And the drivingmechanism needs to be re-designed for an engine of a differentdisplacement volume.

SUMMARY

The technical problem to be solved by the present invention is toprovide an adjustable cam driving mechanism suitable for variousdisplacement volumes.

To solve said problem, the present invention provides an adjustable camdriving mechanism comprising a support frame, an input gear, anintermediate gear and an output gear, wherein the input gear, theintermediate gear and the output gear are respectively arranged on thesupport frame, the intermediate gear is adjustably fixed on the supportframe, and the input gear and/or the output gear are/is adjustably fixedon the support frame.

Further, the support frame has an intermediate adjustment hole in whichthe intermediate gear is arranged; the support frame further has aninput adjustment hole and/or an output adjustment hole, the input gearis arranged in the input adjustment hole and the output gear is arrangedin the output adjustment hole.

Further, the intermediate gear is arranged on a fixing rod via abearing, and the fixing rod is fixed to the support frame via afastening nut.

Further, the input gear is arranged on a fixing rod via a bearing, andthe fixing rod is fixed to the support frame via a fastening nut.

Further, the output gear is arranged on a fixing rod via a bearing, andthe fixing rod is fixed to the support frame via a fastening nut.

Further, a linkage rod is arranged between the intermediate gear and theinput gear, and/or another linkage rod is arranged between theintermediate gear and the output gear.

In the adjustable cam driving mechanism of the present invention, theinput gear, the output gear and the intermediate gear are movablyarranged on the support frame, so that the positions of the three gearson the support frame can be adjusted according to the requirements tochange the vertical distance between the input and output gears, therebyadapting to engines of different displacement volumes.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic structural diagram of an adjustable cam drivingmechanism of the present invention.

FIG. 2 is a schematic diagram showing the internal structure of anadjustable cam driving mechanism of the present invention.

FIG. 3 is a schematic structural diagram of an adjustable cam drivingmechanism according to another embodiment of the present invention.

FIG. 4 is a schematic structural diagram of an adjustable cam drivingmechanism according to yet another embodiment of the present invention.

FIG. 5 is a schematic structural diagram of an adjustable cam drivingmechanism according to yet another embodiment of the present invention.

FIG. 6 is a schematic structural diagram of an adjustable cam drivingmechanism according to yet another embodiment of the present invention.

DETAILED DESCRIPTION

The present invention will be further described below in conjunctionwith the accompanying drawings.

As shown in FIG. 1 and FIG. 2, the adjustable cam driving mechanismcomprises a support frame 1, an input gear 2, an intermediate gear 4 andan output gear 3, wherein the input gear 2, the intermediate gear 4 andthe output gear 3 are respectively arranged on the support frame 1, andboth the intermediate gear 4 and the input gear 2 are adjustably fixedon the support frame 1. The input gear 2 is meshed with an output gear 6of a crank shaft, and the output gear 3 is meshed with a gear 7 of a camshaft.

Specifically, the support frame 1 has an intermediate adjustment hole 11and an input adjustment hole 12. The intermediate gear 4 is arranged ona fixing rod via a bearing, and the fixing rod is fixed to theintermediate adjustment hole 11 of the support frame 1 via a fasteningnut. The input gear 2 is arranged on another fixing rod via anotherbearing, and the another fixing rod is fixed to the input adjustmenthole 12 of the support frame 1 via another fastening nut. The outputgear 3 is arranged on yet another fixing rod via yet another bearing,and the yet another fixing rod is fixed to the support frame 1. Thesupport frame 1 includes two support plates. One sides of the twosupport plates extend toward each other to be connected integrally. Eachsupport plate has a fixing hole for fixing with the engine. Of course,in other embodiments, the intermediate adjustment hole 11 and the inputadjustment hole 12 may be replaced with multiple holes with threads. Inthe present embodiment, the intermediate adjustment hole 11 is arcuateand is bent downwards.

When the vertical distance between the input gear 2 and the output gear3 needs to be changed, the fastening nuts are loosened. Then, theintermediate gear 4 and the input gear 2 are moved and then fixed againby fastening the fastening nuts. Thus, the vertical distance between theinput gear 2 and the output gear 3 is changed, so that engines ofdifferent displacement volumes can share the present invention. Usinggears for transmission, vibration of the air distribution mechanism isalleviated, the engine performance is improved, and discharge of CO andHC is effectively reduced. Therefore, the present invention hasenvironmental protection advantages.

Embodiment 2

As shown in FIG. 3, the present embodiment differs from Embodiment 1 inthat a linkage rod 5 is arranged between the intermediate gear 4 and theinput gear 2, and the linkage rod 5 is fitted over the fixing rod.

When adjustment is made, only the intermediate gear 4 needs to be moved,and the input gear 2 is driven to move. Thus, the adjustment is quickand convenient.

Embodiment 3

As shown in FIG. 4, the present embodiment differs from Embodiment 1 inthat the support frame 1 has an intermediate adjustment hole 11 and anoutput adjustment hole 13, that the output gear 3 is arranged on afixing rod via a bearing, that the fixing rod is fixed on theintermediate adjustment hole 11 of the support frame 1 via a fasteningnut, that the input gear 2 is fixed on another fixing rod via anotherbearing, and that the another fixing rod is fixed on the support frame1. It should be understood that a linkage rod 5 may be arranged betweenthe intermediate gear 4 and the output gear 3. In this embodiment, theintermediate adjustment hole 11 is arcuate and is bent upwards.

Embodiment 4

As shown in FIG. 5, the present embodiment differs from Embodiment 1 inthat the support frame 1 further has an output adjustment hole 13, thatthe output gear 3 is arranged on a fixing rod via a bearing, and thatthe fixing rod is fixed in the intermediate adjustment hole 11 of thesupport frame 1 via a fastening nut. It should be understood thatlinkage rods 5 may be arranged between the intermediate gear 4 and theinput gear 2 and between the intermediate gear 4 and the output gear 3(as shown in FIG. 6).

The above content just describes the embodiment of the presentinvention, and is thus not intended to limit the patent scope of thepresent invention. The equivalent structures, which are made by usingthe description and the content of the drawings of the present inventionand are directly or indirectly applied to other related technicalfields, shall fall within the patent protection scope of the presentinvention.

1. An adjustable cam driving mechanism, comprising a support frame, aninput gear, an intermediate gear and an output gear, wherein the inputgear, the intermediate gear and the output gear are respectivelyarranged on the support frame, the intermediate gear is adjustably fixedon the support frame, and the input gear and/or the output gear are/isadjustably fixed on the support frame.
 2. The adjustable cam drivingmechanism according to claim 1, wherein the support frame has anintermediate adjustment hole in which the intermediate gear is arranged;the support frame further has an input adjustment hole and/or an outputadjustment hole, the input gear is arranged in the input adjustment holeand the output gear is arranged in the output adjustment hole.
 3. Theadjustable cam driving mechanism according to claim 1, wherein theintermediate gear is arranged on a fixing rod via a bearing, and thefixing rod is fixed to the support frame via a fastening nut.
 4. Theadjustable cam driving mechanism according to claim 1, wherein the inputgear is arranged on a fixing rod via a bearing, and the fixing rod isfixed to the support frame via a fastening nut.
 5. The adjustable camdriving mechanism according to claim 1, wherein the output gear isarranged on a fixing rod via a bearing, and the fixing rod is fixed tothe support frame via a fastening nut.
 6. The adjustable cam drivingmechanism according to claim 1, wherein a linkage rod is arrangedbetween the intermediate gear and the input gear, and/or another linkagerod is arranged between the intermediate gear and the output gear.